1. Compute SHA-256 of OTSCanonicalRecord value → must equal OTSHash 2. Open OTSProofURL → extract Bitcoin block number → must equal OTSBitcoinBlock 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Read CopyrightID inside OTSCanonicalRecord → must equal the CopyrightID above 5. GET OTSVerificationAPI → pre-computed 6-check result from server 6. If all match: this entity was registered on CopyrightChains at OTSTimestamp, independently verifiable on Bitcoin Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d3984374b2ad2894e4a42306074b8521a47f9a0cb75cb4fb46f0d2230a82d01. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/84f4d1d7-d737-4cc6-8f62-bc7671bd7285.json and https://artists.proofprofile.net/proofs/artist/84f4d1d7-d737-4cc6-8f62-bc7671bd7285.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68b256dd5302ec7119af5b2d60d8602a96ecfed65f1d29e6c1bcd68a385c2d00. Chain 2 (Bitcoin): anchored in block 958153 (2026-07-15T12:03:04Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USI4R0508299.
The Creatures in the Garden of Lady Walton
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe12bce0ed15bb5d64562e35933b9901fc052a33c2bdcab6baea11ce2fcd61fe4. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/UST841000012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x404235a56e669795c75bb68fae66723b0050446d7be37cb1b26d7bcb9109251e. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/UST841000016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfaa2150db479eef5d207cf68441bfb96b5ee06a79dd6d9d0b9dc5d9948258d79. Chain 2 (Bitcoin): anchored in block 956440 (2026-07-03T04:03:57Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/UST841000017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e338b10bf560163bd0670ff0ec41c05fa97060818ee79fd8a1a109c13bc2d8a. Chain 2 (Bitcoin): anchored in block 956396 (2026-07-02T21:01:51Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/UST841000018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41d1d2968cf26ddb60f9b5af0ef2198bff3b1f37b19d96dbfe837c3e9918dff3. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/UST841000011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe12bce0ed15bb5d64562e35933b9901fc052a33c2bdcab6baea11ce2fcd61fe4. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/UST841000012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f45a488ea405e388b8cfe274f2247a2315ea50e4f5fb2a669b67bd1d9a2a736. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/UST841000013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0342c434bf295496d5fb5ce5b025d1722e3291b9cadc2bea5f3e3442255ee3b5. Chain 2 (Bitcoin): anchored in block 960216 (2026-07-30T06:39:12Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/UST841000014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x404235a56e669795c75bb68fae66723b0050446d7be37cb1b26d7bcb9109251e. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/UST841000016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfaa2150db479eef5d207cf68441bfb96b5ee06a79dd6d9d0b9dc5d9948258d79. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/UST841000017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e338b10bf560163bd0670ff0ec41c05fa97060818ee79fd8a1a109c13bc2d8a. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/UST841000018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd85711387486e0866caf20b8f675061b504e06b6b32cb34c4270ce99f3ab3944. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/UST841000001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51399173820f74bc20e052042e0202616a860ae633208949993973ab74e95570. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/UST841000002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0fb872fde35ce423798d661715ab0c37f66499cdcb8a28823a37329e92955f9. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/UST841000003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd40377ab381acafdf91cc83f78f76aa4603d6fb84351b27b19c93f88b86bd6a. Chain 2 (Bitcoin): anchored in block 960247 (2026-07-30T10:42:33Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/UST841000004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x720b0f243a334d7a4d2b2ab552d15a4c7f7bb49e05f5510a7bb4f0021034bc40. Chain 2 (Bitcoin): anchored in block 960207 (2026-07-30T04:47:22Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/UST841000005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f43a90b98eab53cddf3c44f0d84e4085dcb1d6d6f488aa64cf3e69f247ff0c9. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/UST841000006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74b8437a88e8f47ffb728e9bb9047eb3c7a6139e38c5c98bbdab0ccd691e8bb6. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/UST841000007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd29dff192978c94f815681fa898736e57f39259a91fd6353ed4b05857b9a742e. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/UST841000008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0c9a5ab72b668870e1a1811c08ec5e084846439561ecc839c92068ff7a59dfd. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/UST841000009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16aa2a9098abfd84c78f0ef6f5de7a8be027e177c6a5402940897d60e02b1b9e. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/UST841000010.
The Creatures In The Garden Of Lady Walton
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5e1973105e67bbc465bc989419600aa38c073ec3d6e357402a4d7fb1e7a0aa0. Chain 2 (Bitcoin): anchored in block 960379 (2026-07-31T09:25:34Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/UST841504015.